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The document outlines the history and impact of hashtags in social media, starting from their use in 2007 by San Diego Fire to track wildfire discussions. It highlights the benefits of hashtags, such as increased retweet and like rates on platforms like Twitter and Facebook, while also noting potential drawbacks to Facebook virality. Sources for the information provided include Edgerankchecker.com, Danzarella.com, and Hubspot.com.
